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3 years ago

0.9b + 12 = 0.8b - 9

Mathematics

1 answer:

Charra [1.4K]3 years ago

3 0

Answer:

0.9b+12=0.8b-9

0.9b+0.8b= -9-9

1.7b=-21

=-12.352

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Name this marked angle in 2 different ways

Ilia_Sergeevich [38]

Answer:

The marked angle could be named either NPO or OPN

Step-by-step explanation:

The points can be put in any order except the middle point, which has to be put in the middle. Hope that helps!

3 0

3 years ago

The number of bacteria in a refrigerated food product is given by N ( T ) = 22 T 2 − 123 T + 40 , 6 < T < 36 , where T is

antoniya [11.8K]

Answer:

$N(T(t)) = 1408t^2 - 385.6t - 105.52$

Time for bacteria count reaching 8019: t = 2.543 hours

Step-by-step explanation:

To find the composite function N(T(t)), we just need to use the value of T(t) for each T in the function N(T). So we have that:

$N(T(t)) = 22 * (8t + 1.7)^2 - 123 * (8t + 1.7) + 40$

$N(T(t)) = 22 * (64t^2 + 27.2t + 2.89) - 984t - 209.1 + 40$

$N(T(t)) = 1408t^2 + 598.4t + 63.58 - 984t - 169.1$

$N(T(t)) = 1408t^2 - 385.6t - 105.52$

Now, to find the time when the bacteria count reaches 8019, we just need to use N(T(t)) = 8019 and then find the value of t:

$8019 = 1408t^2 - 385.6t - 105.52$

$1408t^2 - 385.6t - 8124.52 = 0$

Solving this quadratic equation, we have that t = 2.543 hours, so that is the time needed to the bacteria count reaching 8019.

4 0

4 years ago

Does anyone know this question?? I really need help before tomorrow morning!! Like tonight

Alecsey [184]

it is 7, 14+21 =35, 35/5= 7

5 0

3 years ago

Read 2 more answers

My GUY HELP ME!!!!!!!!!!

matrenka [14]

A)
Area: 1,018
Circumference: 113
B)
Area
C) circumference
Hope that helped
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5 0

3 years ago

Read 2 more answers

If x is 6, What is X+4

hichkok12 [17]

Answer:

x = 10

Step-by-step explanation:

We know x = 6

asked: x + 4

Plus it in =>

6 + 4

=> 10

8 0

4 years ago

0.9b + 12 = 0.8b - 9​

0.9b + 12 = 0.8b - 9